沈阳工业大学学报2017，Vol.39Issue(1)：12-16,5.DOI:10.7688/j.issn.1000-1646.2017.01.03
类激光熔覆Stellite合金沉积层的组织及磨损性能
Microstructure and wear properties of Stellite alloy deposited layer prepared by like-laser cladding
摘要
Abstract
In order to further improve the surface properties of 316 stainless steel,the Stellite alloy deposited layer was fabricated on the surface of 316 stainless steel by like-laser cladding technology.The microstructure, chemical composition,microhardness as well as the friction and wear properties of the deposited layer were investigated with scanning electron microscope (SEM),energy dispersive spectroscopy (EDS ),X ray diffractometer (XRD),microhardness tester and pin-dish abrasion tester.The results show that the Stellite alloy deposited layer is mainly composed ofγ-Co solid solution and M23 C6 phase.The microstructure of the deposited layer exhibits the epitaxial growth attached to the interface of 316 stainless steel substrate.From the interface to the surface,the morphology of microstructure transforms from the plane crystal,columnar crystal to cellular dendrite crystal,respectively.In addition,at the position closer to the surface,the microstructure is much finer.The highest hardness of the Stellite alloy deposited layer is 650 HV.During the process of friction and wear, the friction coefficient decreases with increasing the normal loads. Furthermore,the wear mechanism is mainly adhesive wear,abrasive wear and oxidation wear.关键词
316不锈钢/类激光熔覆/Stellite合金/沉积层/显微组织/外延生长/显微硬度/摩擦磨损Key words
316 stainless steel/like-laser cladding/Stellite alloy/deposited layer/microstructure/epitaxial growth/microhardness/friction and wear分类
矿业与冶金引用本文复制引用
张春华,丁燕燕,关锰,谭俊哲,张松..类激光熔覆Stellite合金沉积层的组织及磨损性能[J].沈阳工业大学学报,2017,39(1):12-16,5.基金项目
国家自然科学基金资助项目（51271126）；国家科技专项基金资助项目（2013ZX06002－002）；沈阳市科技局计划项目（F16－032－0－00）． （）
